Dark Sky Odds

Stargazing at Morvan Regional Natural Park: when is the sky clear and dark?

March is the best month for stargazing at Morvan Regional Natural Park: on average 42 clear, moonless hours of full darkness, and 26% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 92% of Europe’s land (NASA VIIRS 2025).

Data updated: 31 December 2025 · Sources and licences

Calculated 5 November 2026 · cloud cover ERA5 2006–2025 · night lights NASA VIIRS 2025

International Dark Sky Reserve · France · DarkSky International

MarchBest month
328Clear moonless dark hours a year
92%darker than … of Europe’s land
26%Nights with ≥ 2 such hours (March)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January13%2017412%
February20%3114821%
March26%4213631%
April24%309930%
May15%166525%
June11%93427%
July19%205636%
August23%299331%
September24%3612030%
October22%3815625%
November16%2317314%
December18%3318918%

Climate, not a forecast: these are shares of past nights (ERA5 reanalysis, 2006–2025), not a prediction for a particular night. Check a forecast before you go.

Light pollution

Darker than92% of Europe’s land
Light pollutionvery dark (darkest 5–20 %)
Sky-glow index (own, VIIRS) — Darkest spot we found0.19
Sky-glow index (own, VIIRS) — at the official map point0.30
Sky-glow index (own, VIIRS) — median across the area0.41
Darkest spot we found47.092, 3.775 (map) — within the OSM boundary

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202610.816%
9 December 20268–9 December 202611.718%
7 January 20277–8 January 202711.513%
6 February 20276–7 February 202710.720%
8 March 20277–8 March 20279.226%
6 April 20276–7 April 20277.324%
6 May 20275–6 May 20275.015%
4 June 20274–5 June 20272.711%
4 July 20273–4 July 20272.519%
2 August 20271–2 August 20274.523%
31 August 202731 August 2027 – 1 September 20277.023%
30 September 202729–30 September 20278.724%

Hours with the Sun below −18° and the Moon below the horizon, on the night of the new moon, at the darkest spot.

Meteor showers

ShowerPeak nightChance of a clear peak nightMoon litMoonless dark hours (Sun < −12°)Radiant max. height
Leonids17–18 November 202628%55%6.564°
Geminids *13–14 December 202633%20%10.276°
Geminids *14–15 December 202630%29%9.076°
Quadrantids3–4 January 202715%13%11.770°
Lyrids22–23 April 202762%95%1.376°
Eta Aquariids *5–6 May 202738%0%6.816°
Eta Aquariids *6–7 May 202737%1%6.716°
Perseids *12–13 August 202735%84%3.268°
Perseids *13–14 August 202737%90%2.268°
Orionids21–22 October 202733%58%3.359°
Leonids *17–18 November 202728%82%1.864°
Leonids *18–19 November 202725%72%3.265°
Geminids14–15 December 202730%98%0.076°

* The peak falls in daylight in Europe, so both neighbouring nights are shown.

Clear peak night: at least 2 hours with ≤ 20 % cloud while the Sun is below −12°, on the same calendar night ± 1 in 2006–2025.

How we calculate